background image

Altitude Selector/Alerter

P/N 01279

I0.0

   + 

I6

Pilot’s Operating

Handbook

Summary of Contents for 01279

Page 1: ...Altitude Selector Alerter P N 01279 I0 0 I6 Pilot s Operating Handbook ...

Page 2: ...visions insert revised pages in the manual and enter date inserted and initials REV NO REVISION DATE INSERTION DATE BY SB NUMBER REV NO REVISION DATE INSERTION DATE BY SB NUMBER List of Effective Pages The asteriskindicates the pages changed added or deleted bythe current change 1st Ed 26 Oct 00 ...

Page 3: ...3 NOTES ...

Page 4: ...Reference 8 Important Points to Remember 8 Features and Functions 9 Self Test 9 Data DTA Entry Operate 9 Baro Calibration 10 Vertical Speed VS Selector 11 Altitude ALT Select Function 14 Altitude Alert ALR Mode 14 Decision Height DH Alert Mode 15 Operation 16 Preflight 17 Inflight 19 Emergency Procedures 20 Lost Encoder Data 21 SYSTEM SPECIFICATIONS 22 LIST OF ACRONYMS 23 ...

Page 5: ...for its proper use The Altitude Selector Alerter combines the computer and program mer units into a single panel mounted unit which contains the display the operating switches and the computer electronics The system was designed to interface the S TEC Autopilot with an altitude encoder tran sponder providing a standard 100 ft increment altitude output Operation of the Altitude Selector Alerter wit...

Page 6: ...6 ...

Page 7: ...er that is proportional to the ampli tude and polarity direction of the vertical speed For example a 500 feet per minute FPM climb VS would produce a plus voltage in an amount representing 500 FPM This signal is not utilized by the autopi lot until the VS Mode is engaged At that time the autopilot compares the existing vertical speed with the selected vertical speed and maneuvers the airplane to m...

Page 8: ...ta entry mode following self test 2 Push DTA to enter or change any data EXCEPT vertical speed VS Once entered push DTA to close the entry mode or the unit cannot communicate your input settings to the autopilot 3 To activate pre selected altitude and vertical speed push both ALT and VS buttons on the autopilot at the same time This is confirmed by the annunciation of both ALT and VS Modes on the ...

Page 9: ... Speed simply push the desired switch button and rotate the selector knob clockwise CW to increase the num ber and counter clockwise CCW to decrease the number Pull the selec tor knob out detent to change decimal numbers When the system is in entry mode it is decoupled from the autopilot however the autopilot will hold the last vertical speed commanded After the required values are selected push D...

Page 10: ...s are omitted 1013 2 would display as 13 2 and 1036 9 would show as 36 9 For any questions on the setting in millibars a quick reference to in Hg can be made by simply pushing the baro button once again NOTE To ensure optimum accuracy of the Altitude Selector Alerter the barometric setting should be updated along with the other barometric flight instruments in the aircraft as required Adjustment B...

Page 11: ... flight level FL 180 The baro setting on the display will continue to display the last baro setting This allows the input of the new area altimeter setting prior to the descent below FL 180 When below an alti tude of 18 000 ft the system will reference to the displayed baro setting Vertical Speed VS Selector NOTE Some installations allow a maximum of 3000 FPM The example given below is for units l...

Page 12: ... vertical speed command displayed will automatically change polarity to match the direction of the altitude and also change to 500 FPM For example if you climb to a selected altitude of 6000 ft the vertical speed display will show 3 or lower 300 FPM climb upon arrival If you next select 5000 ft or lower the vertical speed command will automati cally change polarity to a negative sign and 500 FPM w...

Page 13: ...ture For example When climbing 800 FPM to 6000 ft At 5500 ft the VS will diminish to 700 FPM At 5600 ft the VS will diminish to 600 FPM At 5700 ft the VS will diminish to 500 FPM At 5800 ft the VS will diminish to 400 FPM At 5900 ft the VS will diminish to 300 FPM where it will remain until altitude capture At the maximum climb or descent rate of 1600 FPM the vertical speed schedule will commence ...

Page 14: ... Mean Sea Level altitude of the aircraft displayed to the nearest 100 ft While in operate mode repeated pushes of the ALT button will alternately dis play the encoded or the selected altitude Altitude Alert ALR Mode The Altitude Alert Mode switch enables the altitude alert system in conjunction with the selected altitude displayed in ALT SEL Mode Activation of the ALR switch will display ALR indic...

Page 15: ... to altitude mode and display the altitude until the DH is reached in the descent At the set DH window the DH alert will activate In our example the alert will sound flash at 1250 ft and again at 1150 ft alerting the pilot that he is at or near the set decision height The DH Mode can be disabled by pushing the DH switch causing the DH annunciator to extinguish leaving the altitude displayed It is ...

Page 16: ... altitude well above or below the altitude range you ex pect to be working in For Altitude Preselect set the desired altitude and vertical speed on the Altitude Selector Alerter and simultaneously depress both the VS and ALT switch buttons on the autopilot programmer The autopilot mode annunciator will display both VS and ALT indicating that the au topilot is operating in VS mode with altitude arm...

Page 17: ...ncoder to come on line which will be indicated by encoded altitude being displayed on the Altitude Selector Alerter At this time recycle power to the Altitude Selector Alerter and continue with the pre flight test 3 Altimeter Set to local altimeter setting or field elevation as appro priate 4 Altitude Selector Alerter A Observe self test cycle complete when first powered the sys tem will display a...

Page 18: ...tting on the Altitude Selector Alerter is within 100 of the indicated altitude on the altimeter Extinguishing of the VS annunciation with the ALT remaining on indicates the altitude hold mode has been engaged NOTE Due to tolerances of the Encoder Altimeter altitude en gagement may not occur within 100 ft of indicated altitude If altitude engagement does not occur within 100 of indicated alti tude ...

Page 19: ...he VS selector is in use Automatic VS reduction for a smooth capture will occur as the target altitude is approached If desired the pilot can push the MAN button to transfer VS control to the autopilot VS knob SEL on the optional remote annunciator will extinguish and automatic VS reduction will not occur as the tar get altitude is approached IMPORTANT When using the altitude selector portion of t...

Page 20: ...function If for any reason the Altitude Selector Alerter does not function properly push the MAN Manual button on the Altitude Selector Alerter This will com pletely remove the Altitude Selector Alerter from the autopilot system Do not attempt further use until the fault has been corrected The Alti tude Selector Alerter is a low power device which is essentially dormant unless actually in use by s...

Page 21: ...16 This action informs the pilot that a malfunction has occurred and the selected target altitude is no longer displayed or attainable by using the Altitude Selector Alerter The pilot should push the MAN manual button and control the pitch axis via use of the autopilot VS and ALT Modes If encoder data is restored during the flight the encoded altitude will be displayed instead of the three dashes ...

Page 22: ...22 SYSTEM SPECIFICATIONS Altitude Selector Alerter Power Required 14 28 VDC Weight 1 25 lbs Dimensions 1 6 X 3 42 X 6 75 in TSO C9c ...

Page 23: ...ockwise CW Clockwise DAS Designated Alteration Station DH Decision Height DTA Data ENT Entry FAA Federal Aviation Administration FL Flight Level FPM Feet Per Minute FT Feet HDG Heading HG Mercury IN Inches LBS Pounds MAN Manual SEL Selected VDC Volts Direct Current VS Vertical Speed LIST OF ACRONYMS ...

Page 24: ...one 940 325 9406 FAX 940 325 3904 1 800 USA STEC www s tec com Information in this document is subject to change without notice 2002 S TEC Corporation All rights reserved Printed in the United States of America S TEC and the S TEC logo are registered trademarks of S TEC Corporation P N 87110 Date October 26 2000 Printed in USA ...

Reviews: